No one has been charged yet in Petty Officer Alonzo Gladden Jr.'s death, so the Guardian Angels are taking charge. The group held what it called "a honk to remember" Sunday at the corner of Hollins Ferry Road and Patapsco Avenue in honor of the 24-year-old, who was killed in south Baltimore in October.

Gladden had been home on leave only four hours and was delivering groceries to his grandmother's house when he died.

"This guy was a veteran. He's over there fighting for the United States, and he comes home and then dies four hours after he gets here. And we killed him," said Marcus Dent of the Guardian Angels.

Gladden's mother, Donna Matthews, made an impassioned plea for help at the event.

"Anyone who has any relative information, no matter how small you think it may be, please come forward. Please -- come forward," she said.

Gladden received Navy and Marine Corps medals after his death. In life, his family said the Poly graduate's motto was that dedication to friends, family and work breeds perfection.

"I would like to thank everyone who has sent out prayers and well-wishes to us. I'm also praying for justice to be done," said Gladden's great grandmother, Mary Oliver.

When Gladden was killed, Baltimore police said there was no indication that he was involved in anything that would have led to his death.

While his family is seeking justice in the case, they are also asking for something else in Baltimore.